Dissociative Identity Disorder (DID): A disorder characterized by the presence of two or more distinct personality states that recurrently take control of behavior.
Depersonalization-Derealization Disorder: A type of dissociative disorder that consists of persistent or recurrent episodes of depersonalization (feeling detached or disconnected from oneself) and/or derealization (experiencing the world as unreal, dreamlike, distant, or distorted).
Dissociative Amnesia: A type of dissociative disorder that involves inability to recall important personal information that would not typically be lost with ordinary forgetting. It is usually caused by trauma or stress.